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CVE-2018-25103

18
FAUCET Score

CVE-2018-25103 describes a use-after-free vulnerability in lighttpd versions 1.4.50 and earlier, specifically within its request parsing functionality. This flaw could lead to the server reading from invalid memory pointers during the processing of a single request. Rated as Medium severity with a CVSS score of 5.3, it is network-exploitable with low attack complexity, requiring no user interaction or privileges, but its impact is limited to confidentiality loss. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.4.50CPE match
cpe:2.3:a:lighttpd:lighttpd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.66%
Probability of exploitation in next 30 days
EPSS Percentile
48.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0066 is in the 30th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

9443417.fs1.hubspotusercontent-na1.net / hubfs/9443417/Security%20Advisories/2024/AMI-SA-2024002.pdf
blogvdoo.wordpress.com / 2018/11/06/giving-back-securing-open-source-iot-projects
github.com / lighttpd/lighttpd1.4/commit/d161f53de04bc826ce1bdaeb3dce2c72ca50a3f8
github.com / lighttpd/lighttpd1.4/commit/df8e4f95614e476276a55e34da2aa8b00b1148e9
kb.cert.org / vuls/id/312260
runzero.com / blog/lighttpd